Bus support



BUS SUPPORT Filed Feb. 15 1926 A121: Sit 9mm [NEIL Patented July 1, 1930 UNITED STATES PATENT OFFICE ALWIN G. STEINMAYER, OF MILWAUKEE, WISCONSIN, ASSIGNOB, BY MESNE ASSIGN- MEN'IS, TO LINE MATERIAL COMPANY,

CORPORATION OF DELAWARE OF SOUTH MILWAUKEE, WISCONSIN, A

BUS snrroar This invention relates to certain new and useful improvements in bus supports and more particularly to that type of bus support especially designed for use in handling voltages of 2300 volts or less.

Heretofore, on 2300 volt service it has been necessary to use supports'suitable for 6600 or 7500 volts due to the fact that the effective clearance between the metal securing members on each end of the porcelain has been considerably less than the height of the porcelain. These securing members consisted of flanged thimbles cemented into recesses in both ends of the porcelain and it is evident that to obtain the proper inechanical strength it was necessary that thimbles be comparatively long thus greatly increasin the height of the porcelain and consequent y the cost thereof, and, therefore, it is an object of this invention to provide a bus support which has its porcelain relatively shortened without any loss in efiiciency.

Another object of this invention resides in the provision of means for securing the hardware thereto whereby the porcelain is held in compression at all times thus increasing its ability to withstand all normal working stresses.

A further object of this invention resides in the provision of a bus support having its porcelain member bored and its hardware secured thereto by bolts assed through the bores in the porcelain t ereby making the support readily adaptable to use with any of the various styles of hardware common to the art to which this invention belongs.

A still further object of this invention resides in the production of a bus support at a relatively low cost and in which all assembling of parts with cement is eliminated.

With the above and other objects in view which will appear as the description proceeds, my invention resides in the novel construction, combination and arrangement of parts substantially as hereinafter described and more particularly defined by the appended claims, it being understood that such changes in the precise embodiment of the hereindisclosed invention may be made as come within the scope of the claims.

Referring now more particularly to the accompanying drawing in which like numerals designate like parts throughout the several vlews, the numeral 5 designates a bus bar which is supported from a mounting member 6 by a bus support 7. While in the drawing the member 6 has been shown as a pipe, it is understood that various shapes and forms of mounting members may be employed.

The support 7 consists of an insulating member 8 of porcelain or other non-conduct ing material, having a flat top 9 and a flat bottom 10. The porcelain member also has a pair of diametrically opposed bores 11 counter-bored from the bottom 10, as at 12, and a pair of diametrically opposed bores 13 counter-bored from the top 9 or the porcelain member, as at 14, and so arranged that lines drawn through the center of the pairs of bores will intersect at the axis of the member 8 at right angles to each other.

The porcelain member is supported above the member 6 by a base member 15-Which may be suitably secured thereto by a clamping device or other means 15, and has an upper annular flange 16 provided with a pair of vdiametrically opposed'arcuate slots 17. A

centrally located boss 18 projects above the top face of flange 16 and is received within a recess 9 in the bottom 10 of the porcelain.

The boss .8 provides a pivot about which the porcelain. may be rotated, and the arcuate slots 17 are so arranged to radially align the bores 13 the: *th. Securing bolts 20 are passed through the bores 13 with their heads anchored in the counterbores 14 and extend down through the arcuate slots 17 to adjustlegs 22 of members 21 are apertured to receive securing bolts 23 passed through the porcelain bores 11 with their heads anchored in the counter-bores 12. The long or vertical legs 24 of the members 21 are provided with a plurality of registering apertures 25 spaced at different distances from the top of the 1porcelain, to accommodate bus bars of various eights. The legs 24 are spaced a distance substantiall equal to the width or thickness.

of the bus ar and rigidly clamp the same therebetween, being drawn together by a clamping bolt 26. 1 v

If desired the counter-bores 12 and 14 may be filled after assembly, with a suitable plastic insulating compound, as shown in Figure 2 by the dotted cross hatching 27. In so doing, cutting down the electrical flash-over of the assembled unit, by the filling of the counterbores with dust, dirt or moisture, is entirely eliminated.

The construction described eliminates the various stresses which accompany bus supports of the old style in which the porcelam 1s deeply recessed at both ends to accommodate the thimbles of the hardware. As will be readily obvious the securing bolts 20 and 23 tend to create opposed stresses within the porcelain itself thereby putting the same entirely in compression at all times. In addisaid insulating member having a plurality of bores counter-bored from the top and a plurality of bores counter-bored from the bottom, electrical means adapted to be an ported from the top of said insulator mem er, securing means passed through the first-mentioned bores and through arcuate slots in the base member struck on an are having the axis of the pivot boss as a center to adjustably secure the insulating member to the base member, and means passing through the second-mentioned bores to secure the electrical means to the insulating member.

In testimony whereof I aflix my signature.

ALWIN G. STEINMAYER.

tion, my invention reduces the overall height 1 of the support, permitting its use in cramped quarters.

What I claim as my invention is:

1. A device of the class described, comprising a base member, a flange on the base member having arcuate slots therein, a centrally disposed lug projected from the base member, an insulating member adaptedto support a conductor and having a recess adapted to receive the In said insulating member being adjustable a out the lug, and securin means 1 passed through the insulating mem r and the arcuate slots to adjustably secure the same to the flange.

2. A device of the character described, comprising a base member having a flat top face, a pivot boss centrally projecting above the top surface of the base member, an insulating member having a fiat bottom surface with a central pivot recess whereby the abutting faces of said members substantially conform, 

